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The Yankee Hill Machine Low Profile Gas Block is an excellent upgrade for your AR-15. The Low Profile Gas Block is made of high quality steel and is mounted via 2 clamping screws. The overall length of the Low Profile Gas Block is .95" and has a bore diameter of .75"

Specifications and Features:
Steel Construction 
Mounted via 2 clamping screws
.95" Long 
Matte Black 
Gas Block Bore Diameter .75"
Made in the USA